Cursor app hooks bugs of additional_context

[Colin]

Hey @eos

Thanks for the report. This is a known issue that has beeen reported previously.

sessionStart hook additional_context is never injected into agent's initial system context

Where does the bug appear (feature/product)? Cursor IDE Describe the Bug A sessionStart user hook that writes {“additional_context”: “…”} to stdout per the documented schema is loaded and executed by Cursor (verified via the Hooks output channel and via a side-channel debug log written by the hook itself), but the returned additional_context value is never added to the agent’s initial system context. Reference: Hooks | Cursor Docs — the docs explicitly state that additional_context is “added t…

Different hook behavior in regards to CLI vs MCP usage

Hey, thanks for the detailed analysis. The comparison between Agent Chat and Agents View is a really useful data point. This is a confirmed bug that affects sessionStart hook additional_context injection. This was also reported in this thread, where our team confirmed the root cause and has filed an internal bug. No ETA on a fix yet, but the timing angle from your report (showing it’s worse in one view than the other) will help scope the fix. Unfortunately, there’s no workaround right now. Th…

I’ve attached your report to your existing bug report, which helps us prioritize!